CustomItem : Label dont Expand

[Vinicius Souza]

Hello ppls!
Im creating a CustomItem called Label. I need that this item respect the CustomItem.LAYOUT_EXPAND style but I dont know how to handle correctly this notification. Below my code for Label:

import javax.microedition.lcdui.CustomItem;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class Label extends CustomItem 
{
	private Displayable listener;
	private int  w, h;
	private int  Color, fontColor;
	private String caption;
	private Font font;
	
	public String getCaption()
	{
		return caption;
	}
	
	public void setCaption(String caption)
	{
		this.caption = caption;
		repaint();
		
	}

	public void setColor(int color)
	{
		Color = color;
	}
	public void setFontColor (int color)
	{
		fontColor = color;
	}
	
	public void setFont (Font f)
	{
		font = f;
	}
	
	public Label(String caption)
	{
		this(caption, null);
	}
    public Label(String c, Displayable listener)
	{
		super("");
		font          = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_BOLD, Font.SIZE_SMALL);
		this.listener = listener;
		this.w        = 80;
		this.h        = 32;
		Color         = 0x3366FF;
		fontColor     = 0xFFFFFF;
		caption       =  c;
	}
	
    protected int getMinContentHeight()
	{
		return h;
    }

    protected int getMinContentWidth()
	{
		return w;
    }

    protected int getPrefContentHeight( int width )
	{
        return getMinContentHeight();
    }

    protected int getPrefContentWidth( int height )
	{
        return getMinContentWidth();
    }

	protected void sizeChanged(int w, int h)
	{
		super.sizeChanged(w, h);
		this.w = w;
		this.h = h;
		invalidate();
	}

    protected void paint(Graphics g, int width, int height )
	{
		if (g == null) return;
		g.setColor(Color);
		
		g.fillRect(0, 0, width, height);

		g.setColor(fontColor);
		g.setFont(font);
	    g.drawString(caption, width / 2 + 1, height / 2 + 4, Graphics.HCENTER | Graphics.BASELINE);
    }
		
}

Any clue about why its not working ? Why the Label dont respect its width change?
Thanks in advance.